FEATURES
Low Quiescent Current: 300µA
-7V to +12V Common-Mode Input
Voltage Range
Three-State Outputs
50ns Propagation Delays, 5ns Skew
Half-Duplex Version Available
Operate from a Single 5V Supply
Allows up to 32 Transceivers on the Bus
Data rate: 10 Mbps
Current-Limiting and Thermal Shutdown
for Driver Overload Protection
Enhanced ESD Specifications:
±15kV IEC61000-4-2 Air Discharge
±8kV IEC61000-4-2 Contact Discharge
APPLICATIONS
Low power RS-485 systems
DTE/DCE interface
Packet switching
Local area networks (LNAs)
Data multiplexers
Data concentration
Integrated services digital network (ISDN)
GENERAL DESCRIPTION
The CBM485 is low-power transceivers for
RS-485 and RS-422 communication. IC
contains one driver and one receiver.
The driver slew rates of the CBM485 is not
limited, allowing them to transmit up to 10
Mbps.
These transceivers draw between 120µA
and 500µA of supply current when unloaded
or fully loaded with disabled drivers. All parts
operate from a single 5V supply. Drivers are
short-circuit current limited and are protected
against excessive power dissipation by
thermal shutdown circuitry that places the
driver outputs into a high-impedance state.
The receiver input has a fail-safe feature
that guarantees a logic-high output if the
input is open circuit. The CBM485 is designed
for half-duplex applications.
